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Read through the first 10pgs not doing all 273 right now on the mobile. Did you swap to heavyweight to increase change intervals or was the lightweight still to slick? Been running straight lightweight for the last ~35k w/o any complaints on a tranny w 140k.

Read through the first 10pgs not doing all 273 right now on the mobile. Did you swap to heavyweight to increase change intervals or was the lightweight still to slick? Been running straight lightweight for the last ~35k w/o any complaints on a tranny w 140k.

The lightweight wears out....the heavyweight does not....at least at any rweasonable interval that i can discern
im going to be using ~50k mile trans lube change intervals(up from 20k) and it likely can go a lot longer under more casual use

no reason to use something that is gonna wear out if you can use something that wont....right???

i have found NOTHING that leads me to believe that the lightweight shockproof should be used AT ALL, if the heavyweight is available

Didn't see anything on age of transmissions I have 180k would this be good to use? I have just put Castrol SYNTRAX LIMITED SLIP 75W-90 in my rear diff.

Thanks in advance

In my experience, on a trans from a 1995 Impreza with 235k miles, it was better than whatever black water it replaced. The trans went through severe driving conditions and none of the drivers complained.

Just my experience though. I dunno what kind of shape your trans is in.

I am just about to change the oil in my trans and accessed the site to find the . quantities. I purchased all of the ingredients about a year ago and find that I have the Redline Lightweight shockproof. I was sure it was right at the time. Reading several forums in here I see that a lot of owners are using the lightweight. However the answer and instructions to the question very clearly state the use of the heavyweight oil. Help, which one is it?

I am just about to change the oil in my trans and accessed the site to find the . quantities. I purchased all of the ingredients about a year ago and find that I have the Redline Lightweight shockproof. I was sure it was right at the time. Reading several forums in here I see that a lot of owners are using the lightweight. However the answer and instructions to the question very clearly state the use of the heavyweight oil. Help, which one is it?

Just changed to the cocktail @ 274,000 miles on a '04 wrx wagon. Dino 75w90 before. Solved the 4th gear grind that was getting annoying and the shifting in general is just better. Getting into reverse still takes some coaxing sometimes, but it too has become better, just not solved.

Sorry if its already been said but 275 pages is too much looking for me but what is a cocktail? And dccd?

from post number 1

Quote:

2qt 80w90 Castrol HypoyC(NOW labeled Axle Limited Slip 80W-90 by Castrol in North America) NO stupid PM's on this either

1qt Redline HEAVYWEIGHT SHOCKPROOF....NOT the LIGHTWEIGHT!!!

1qt Penzoil 'SYNCHROMESH' transmission fluid....the GM synchromesh fluid PN 12345349 is available at any GM dealer and can be used if the Penzoil product is not available....the Penzoil one IS better.
__________________________________________________ _________

1) FOR BEST RESULTS DRAIN THE TRANSMISSION FOR AT LEAST 30 MINUTES...REMOVE the trans dipstick and use a funnel(see below) with a long spout....

Pour the WHOLE BOTTLE of the HEAVYWEIGHT SHOCKPROOF(NOT THE LIGHTWEIGHT) into the trans....

2) Pour EXACTLY 1/2 of ONE of the bottles of CASTROL into the now empty shockproof bottle and shake it gently.....and pour THAT into the trans

3) Pour ALL REMAINING CASTROL PRODUCT into the trans.

4) Pour EXACTLY 1/3 of the 'synchromesh' into the trans and replace the dipstick

5) Drive car in a NORMAL AND RATIONAL AND REASONAL MANNER using ALL the gears INCLUDING REVERSE.....

6) Park car on LEVEL surface....wait at least 20 minutes and check trans fluid level.....top up with the synchromesh product.

THE 5MT TRANSMISSION DOES NOT LIKE TO BE AT ALL UNDER FILLED....A BIT OVER FILLED IS BETTER THAN ANY UNDERFILL AMOUNT.
OVERFILLING THE TRANSMISSION S L I G H T L Y IS NO BIG DEAL.....DO NOT WORRY ABOUT IT. NO stuid pm's or posts on this please